APEX MICROTECHNOLOGY CORPORATION
TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
3
4
5
6
2
1
7
8
A1
D1
Q1
Q4
Q3
Q5
C1
Q2A
Q2B
Q6B
Q6A
TYPICAL APPLICATION
FIGURE 1. VOLTAGE-TO-CURRENT CONVERSION
DC and low distortion AC current waveforms are delivered
to a grounded load by using matched resistors (A and B
sections) and taking advantage of the high common mode
rejection of the PA10.
Foldover current limit is used to modify current limits based
on output voltage. When load resistance drops to 0, the current
is limited based on output voltage. When load resistance
drops to 0, the current limit is 0.79A resulting in an internal
dissipation of 33.3 W. When output voltage increases to 36V,
the current limit is 1.69A. Refer to Application Note 9 on
foldover limiting for details.
EXTERNAL CONNECTIONS
S
R
R2B
.82
.82
–42V
+42V
R2A
R1A
PA10
R1B
LOAD
0-24
CONTROL
FEATURES
GAIN BANDWIDTH PRODUCT — 4MHz
TEMPERATURE RANGE — –55 to +125
°
C (PA10A)
EXCELLENT LINEARITY — Class A/B Output
WIDE SUPPLY RANGE —
±
10V to
±
50V
HIGH OUTPUT CURRENT —
±
5A Peak
APPLICATIONS
MOTOR, VALVE AND ACTUATOR CONTROL
MAGNETIC DEFLECTION CIRCUITS UP TO 4A
POWER TRANSDUCERS UP TO 100kHz
TEMPERATURE CONTROL UP TO 180W
PROGRAMMABLE POWER SUPPLIES UP TO 90V
AUDIO AMPLIFIERS UP TO 60W RMS
DESCRIPTION
The PA10 and PA10A are high voltage, high output current
operational amplifiers designed to drive resistive, inductive and
capacitive loads. For optimum linearity, the output stage is
biased for class A/B operation. The safe operating area (SOA)
can be observed for all operating conditions by selection of user
programmable current limiting resistors. Both amplifiers are
internally compensated for all gain settings. For continuous
operation under load, a heatsink of proper rating is recom-
mended.
This hybrid integrated circuit utilizes thick film (cermet)
resistors, ceramic capacitors and semiconductor chips to maxi-
mize reliability, minimize size and give top performance. Ultra-
sonically bonded aluminum wires provide reliable interconnec-
tions at all operating temperatures. The 8-pin TO-3 package is
hermetically sealed and electrically isolated. The use of com-
pressible isolation washers voids the warranty.
EQUIVALENT SCHEMATIC
CL+
+V
+IN
–
IN
–
V
FO
CL
–
OUT
S
S
TOP VIEW
R
CL+
R
CL
–
OUTPUT
1
2
3
4
5
6
7
8
HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739
M I C R O T E C H N O L O G Y
POWER OPERATIONAL AMPLIFIERS
PA10 PA10A